SILICONE RESIN SHEET WITH EXCELLENT STORAGE STABILITY OF A SEMI-HARDENED MATERIAL REGARDLESS OF THE PRESENCE OF SILICA PARTICLES AND THE KIND OF CURING RETARDERS

摘要

PURPOSE: A silicone resin sheet is provided to ensure an excellent light-proof property and heat resistance and to satisfactorily perform the encapsulation of high power LED devices.;CONSTITUTION: A silicone resin sheet is obtained by semi-curing a composition for a silicon resin comprises (a) organic polysiloxane having two or more alkenylsilyl groups within one molecule, (b) organopolysiloxanes having two or more hydrosilyl groups within one molecule, (c) hydrosilylation catalysts, and (d) curding retarders. The curding retarders have at least one of a compound selected from the group consisting of an acetylene-based compound and an olefin-based compound.;COPYRIGHT KIPO 2012